Dear list members,
Today we received a portion of red urine (negative for Hb and ery) from a
rheumatology patient. No unusual medication, no clinical details available.
The color was eosine-like, ph 6 (eosin is not red in acidic samples
according to my literature). On alkalinization the color changed to pale
yellow; on acidification to red with a purple hue. The color of the urine
did not darken on standing. Na 122 mmol/L, K 24 mmol/L. There was no
fluorescence under the UV-lamp.
We suspect that the color could be due to the consumption of beets (changing
color as an indicator). The clinician suspected porphyria - alas symptoms
(and clinician) unvailable. We thought it wise to store the sample for
porphyrin analysis, just to be sure.
Any similar cases are appreciated.
Regards,
Raymond Wulkan
MCRZ-Zuider
Rotterdam-NL
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